Disk-sharpener.



No. 675,8l6. Patented :une 4, wol. w. E. CLARK.

DISK SYHARPENEB.

(Application led May 25, 1900.) (No Model.) 2 Sheets-Sheet l.

No. 675,8l6. Patented lune 4, 190|. W. E. CLARK.

DISK SHARPENEB.

(Applicqton led my 95, 1900. (llo Molini.) 2 Sheets-Sheet 2.

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\VILLIAM E. CLARK, OF MOLINE, ILLINOIS.

DISK-SHARPENEFL SPECIFICATION forming part of Letters Patent No. 675,816, dated June 4, 1901.

Serial No. 17,990. (No model.)

To @ZZ whom it mfr/y concern.-

Be it known that I, WILLIAM E. CLARK, a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented a new and useful Disk-Sharpener, of which the following is a specification.

This invention relates to disk-Sharpeners in general, and more particularly to that class adapted for the sharpening of the disks of farm implements by hand-power, one object of the invention being to provide a simple structure comprising a supporting-bracket which may be secured to any suitable portion of abarn or to a suitably-located post to hold it rigid, and which comprises means for readily applying and removing a disk and for holding and operating a cutter to cause it to travel around the disk, and thus cut an even chip.

A further object of the invention is to provide a construction by means of which preliminary chips may be first taken at different angles, preparatory to the taking of a final chip to finish the disk.

In the drawings forming a portion of this specification, and in which similar numerals of reference designate like and corresponding parts in the several views, Figure l is a perspective view showing the complete cutter attached to a post and illustrating the position of a disk during the sharpening operation. Fig. 2 is a transverse section taken through the supporting bracket and the ratchet-carrying arm and showing the disksupport and the cutting mechanism in elevation. Fig. 3 is a section on lines 3 3 of Fig. 2. Fig. i is a section on line 4 4: of Fig. 2. Fig. 5 is a section on line 5 5 of Fig. 2, with the operating-lever omitted and illustrating the clamp and carrier by means of which the cutting-tool is supported, the clamping-bolt being shown in elevation. Fig. 6 is a detail perspective view showing the supportingbracket and the protruding end of the pawl carried thereby. Fig. 7 isa perspective View showing the uppermost element of the coinbined clamp and tool-carrier. Fig. S is a perspective view showing the upper jaw oi the clamp of the tool-carrier. Fig. t) is a perspective View showing the lower jaw of the clamp ofthe tool-carrier. Fig. IO is a perspective view showing the connecting-link by means of which the operating-lever is connected with the supporting-bracket and illustrating the friction-roller carried thereby. Fig. 11 is a perspective View showing the tool employed by me.

Referring now to the drawings, the present invention comprises a supportingbracket including an arched base 15, at one end of which arch is a foot 1G, having an opening 17 for the passage of a bolt by means of which the bracket is held upon a suitable support. From the opposite side of the base of the bracket extends an arm I8, at the end of which is a forwardly-extending casing 19, in which is disposed a pawl 2O for a purpose which will be presently explained, and which pawl is held normally with its outer beveled end 2l projected exteriorly of the casing by means of a helical spring 22, the ends of which encircle pins 23 and 24, carried by the base of the pawl and the base of the casing, respectively. This arm 18 may be provided with openings for the reception ot further securing-bolts.

Carried by the arch-shaped base I5 is a bearing-sleeve 25, which extends forwardly' and parallel with the casing 19, and connecting this sleeve 25 and the adjacent face of the casing is a strengthening-rib 26, it being understood that all parts of the structure described, with the exception of the pawl and its spring, are cast or otherwise formed integral.

A carrier for the disk to be sharpened or a support therefor consists of a wheel 27, comprising a hub 28, spokes 29, and a rim 30, the hub being extended axially, as shown in Fig. 3, so as to project at one side of the wheel, and this projecting portion of the hub is tapered to fitwithin the bearing-sleeve 25. The extended portion 28 of the hub of the wheel has a lesserdiameter than that portion of the hub lying within the inclosure of the rim, resulting in the formation of a shoulder 3l, which lies against the outer end of the sleeve 25. The outer face of the rim 30 of the wheelthat is, the face opposite to the hub extentension-is beveled to the periphery of the rim, as shown at 32, the object of this bevel being to more snugly receive the face of the concavod side of a disk, (shown at 33,) and IOO which disk is adjusted to the supportingwheel in such a manner that it will project beyond the periphery of said wheel. "he disk is heldin this position by means of a bolt 3l, which is passed outwardly through the hub 2S and through the central perforation of the disk, a washer l5 being disposed between the head of the bolt and the adjacent ends of the sleeve 25 and hub 2S. A frustcconical centering-block 3G is disposed upon the bolt 31, with its diminished end passed inwardly through the central opening of the disk, the centering-block 36 being drawn to this position by means of a nut 37 upon the outer threaded end of the bolt 3l, and which engages directly with a washer 38, which it forces against the centering-block. lly this means the disk is brought to lie concentric with its supporting-wheel and is held firmly in this position.

Upon the sleeve is a peripheral flange Si), between which and the shoulder 3l is disposed a ring 40, which tits snugly upon the sleeve and between the flange and shoulder, this sleeve having a radially-disposed and perforated lug atl, towhich the cutting mechanism is attached. The cutting mechanism comprises an operating-lever 15, to one end of which is bolted a bracket 46, comprising parallel ears 47, having pcrforations, and between these ears is disposed a link 1S, which is pivotally connected therewith by means of a bolt 49, passed through the perforations in the ears and au alining perforation in the links. The link projects at both ends beyond the ears 47, and one of these projecting ends is perforated, as shown at 50 in Fig. lt), for the reception of a pivot-bolt 5l, which is passed through the perforation 50 and the perforation of the lug 4l, this link thus aeting to connect the lever 45 movably with the supporting-bracket. The perforated end of the link 1S projects beyond the end of the lever-15, while the opposite end extends a slight distance along the face of the lever in an opposite direction and is provided at its extremity with a stub-shaft 52, upon which is mounted a friction-roller 53, held in place by means of a key 5l or in any other suitable manner. This friction-roller 53 is disposed to lie beyond the periphery of the supportingwheel 30 and in a position to engage the surface of the disk during the cutting operation.

The cutting-tool is adjustably mounted upon the lever 45 through the medium of a carrier comprising three principal elements, of which two form clamping-jaws adapted to grip the lever 45, while the third is adjustably mounted and receives the cutting-tool directly. In the drawings this carrier is shown as comprising a lower jaw including a central portion 55, having a major upturned end 56 and a minor upturned end 57, between which ends and upon the upper face of the body portion are formed lugs 5S and 59, intermediate which is a squared perforation GO for the reception of a clamping-bolt in a manner to be presently described. The upper edge of the major upturned end 5G is tapered, as shown at (5l, to enter the recessed edge of the major downturned end of of the body portieri 355 of the upper jaw of the clamp of the carrier, this upper jaw also having a minor downturned end (il, which when the ends 5G and C2 are in engagement lie one above the other. Upon the lower face of the upper jaw are formed lugs (55, which lie ata distance from the adjacent face of the downturned end Gl equal to the distance between the end 57 of the lower jaw and the lugs 58 and 5t), this separation being equal to the width of the lever t5, which is adapted to be received in these resultant recesses, as illustrated in Fig. l. A perforation Gti is formed in the body portion of the upper jaw to aline with the perforation GO, and through these perforations is passed upwardly a clampingbolt (37, the squared portion of which adjacent the head tits the perforation GO to prevent the bolt from rotating.

The tool-receiving element of the carrier has a circular flange Gf) upon its lower face, which lies against the inner face of a similar flange upon the upper end of the uppermost jaw, to permit rotatable adjustment of this tool-holding member without displacement, thc tool-holding member having acentral perforation 7l, through which the bolt 67 is passed, said bolt having a clamping-nut 73 upon its upper end, which engages the toolholding member and by forcing it downwardly upon the upper jaw holds it firmly thereagainst and at the same time clamps the jaws upon the operating-lever -l in a manner which will be understood.

The tool-carrying member of the carrier is provided with a casing 75 at one side, which has a squared passage therethrough, and this passage is adapted to receive a correspondingly-formed tool 76 and hold it in a plane parallel with the upper face of the operatinglever l5, the tool being held in its proper adjusted position by means of a set-screw 77 engaging the threads of the perforation in the upper side of the casing and adapted to impinge the adjacent face of the tool.

As illustrated in Figs. l and 2 of the drawings, the supporting-wheel 27 is provided upon the rear face of its rim with ratchetteeth 78, which are adapted for engagement by the pawl 2O when the supporting-wheel is rotated in one direction and to slide freely over the teeth when the wheel is rotated in the opposite direction.

The operation of the sharpener is as follows: The parts having been assembled to form the structure above described and the disk having been adjusted tothe supportingwheel 27, as illustrated, the cutting-tool 76 is brought to engage the convexcd face of the disk adjacent to the rim. Referring now to Fig. l of the drawings, the lever 45 is swung to the right and is raised, the frictional engagement of the cutting-tool with the disk IOO IIO

IIS

causing the disk and the supporting-wheel to rotate slightly as the lever is raised, at which time the spring-pressed pawl will ride over the ratchet-teeth. The lever is then moved downwardly and at the same time is held to press the tool tightly against the face of the disk, at which time the pawl will engage a ratchet-tooth and hold thc wheel and the disk from rotating. Continued movement of the lever will cause corresponding movement of the cutter, with the result that a shaving will be cut from the surface of the disk. By continuing to raise and lower the lever the disk will be adjusted for the successive cuts, and the successive cuts will be made until a chip has been taken throughout the circumference of the disk. The tool may be then adjusted to take a second chip in the same plane or it may be adjusted to take a chip at an angle to the plane of the first chip, after which a third chip may be taken to cut off the angular projection resulting from the lirst two chips, and the disk may be finished with a keen cutting edge. During this oscillation of the shaft 25 the roller 53 is in engagement with the inner face ot' the disk, and while limiting the movement of the lever laterally in one direction it permits free vertical movement of the lever.

It will of course be understood that the mechanism above described may be operated in any suitable manner and for any purpose to which it is adapted and also that the speeitic structure and arrangement shown may be modified and that any suitable materials and proportions may be used without departing from the spirit of the invention.

l. A disk-sharpener comprisingr a rotatable disk-support, means .for holding the support against rotation in one direction, and a movable tool-carrier adapted to hold a tool in operative relation to a disk upon the support, to adjust the disk in one direction and move the tool with respect to the disk in a different direetion.

2. A disk-Sharpener comprising a movable disk-support, means for holding the support against movement in one direction, and a tool-carrier adapted to hold a tool in operative relation to a disk upon the support and move the tool in one direction to move the support and to move the tool in an opposite direction to cut the disk.

3. A disk-Sharpener comprising a movable disk-support, means for holding the disk against movement in one direction, and a tool-carrier movable into and out of operative relation to the support and adapted to hold a tool in operative relation to a disk upon the support and to move the tool in dit"- ferent directions to move the support and to eut the disk.

4. A disk-sharpener comprising a movable disk-supportprovided with a ratchet, a pawl adapted for engagement with the ratchet to hold the support against movement in one direction, a toolcarrier adapted to hold a tool in operative relation to a disk on the support and to move the tool alternately in opposite directions to move the support and to cut the disk, and means for moving the carrier.

5. A disk-Sharpener comprisinga rotatable disk-support, means for holding the support against movement in one direction, a lever pivoted coaXially with the support, and a toolcarrier mounted upon the lever and adapted for movement into and out of operative relation with a disk upon the disk-support, to engage a tool with tbe disk, said lever being adapted for movement upon its pivot to operate the tool to alternately rotate the disk-support and cut the disk.

6. A disk-Sharpener comprising a rotatable disk-support, a link rotatably mounted coaxially with the disk-support and having a friction-roller adapted forengagement withadisk upon the support, said link being adapted for movement to engage the roller with and disengage it from the disk, a lever pivoted to the link, a tool-carrier adjustably mounted upon the lever and adapted for movement therewith into and out of operative relation to the disk-support, and means for holding the carrier in its adjusted positions, said carrier being adapted to hold a tool against the disk upon the support and adapted for oscillatory movement with the lever peripherally of the disk.

7. A disk-Sharpener comprising a rotatable disk support, means for holding the disk against rotation in one direction, a link rotatably mounted coaxially with the disk-support and having a friction-roller adapted for engagement with a disk upon the support, said link being adapted for movement to engage the roller with and disengage it from the disk, a lever pivoted to the link, a tool-carrier adjustably mounted upon the lever and adapted for movement therewith into and out of operative relation to the disk-support, and means for holding the carrier in its adjusted positions, said carrier being adapted to hold a tool against the disk upon the support and adapted for oscillatory movement with the lever peripherally of the disk.

8. A disk-Sharpener comprising a bracket provided with a bearing, a disk-support having an extension rotatably mounted in the bearing, a ratchet upon the support, a springpressed pawl mounted in the bracket and lying in operative relation to the ratchet, a ring rotatably mounted upon the bracket, a link pivoted to the ring at one end and provided with a friction roller at the opposite end adapted for engagement with a disk upon the support, a lever pivoted to the link and movable toward and away from the disk upon the support, and a tool-carrier adjustably mounted upon the lever and movable therewith into and out of operative relation to a disk to move the disk and the carrier in one direction and to cut the disk in a different direction.

9. In a disk-Sharpener, the combination IOO IOS

IIO

with a supporting-bracket comprising a sleeve provided with a bearing, of a disk-supporting wheel having an extended hub rotatably mounted in the bearing, a bolt passed through the bearing and hub, a centering-block upon the bolt and adapted to enter the central perforation of a disk and clamp the latter upon the supporting-wheel and concentric therewith, ratchet-teeth carried by the wheel, a pawl mounted in the bracket in operative relation to the ratchet-teeth and adapted to hold the Wheel from rotating in one direction, and

a tool-carrier pivotally mounted concentric with the wheel, said carrier being adapted to hold a tool against a disk upon the Wheel and oscillare the tool peripherally of the disk to alternately move the Wheel and cut a chip.

In testimony that I claim the foregoing as my own I have hereto aixed my signature in the presence of two Witnesses.

WILLIAM E. CLARK.

lVitnesses: r

SELMA O. RUNDQUIST, W. J. ENTRIKIN. 

